Spinning dust appears to be the best explanation for the anomalous emission that has been observed at ∼10−60 GHz. One of the best examples of spinning dust comes from a HII region in the Perseus molecular cloud. Observations of other HII regions also show tentative evidence for excess emission at frequencies ∼30 GHz, although at lower emissivity levels. A new detection of excess emission at 31 GHz in the HII region RCW175 has been made. The most plausible explanation again comes from spinning dust. HII regions are a good place to look for spinning dust as long as accurate radio data spanning the ∼5−100 GHz range is available.
@article{arxiv.0808.0473,
title = {Anomalous Emission from HII regions},
author = {C. Dickinson},
journal= {arXiv preprint arXiv:0808.0473},
year = {2008}
}
Comments
Proceedings of the conference "CMB Component Separation and the Physics of Foregrounds", 4 pages, 2 figures